Not working one gets led astray (4)
I believe the answer is:
idle
'not working' is the definition.
(idle means doing no work)
'one gets led astray' is the wordplay.
'one' becomes 'i' (Roman numeral).
'gets' says to put letters next to each other.
'astray' indicates an anagram.
'led' anagrammed gives 'dle'.
'i'+'dle'='IDLE'
(Other definitions for idle that I've seen before include "'Lazy, not doing anything (4)'" , "Not active or at work" , "Maybe Eric" , "Mike" , "Tick over like engine" .)